/nawr'ep euh nef"rin, -reen/ , n.
1. Also called noradrenaline . Physiol. a neurotransmitter, released by adrenergic nerve terminals in the autonomic and possibly the central nervous system, that has such effects as constricting blood vessels, raising blood pressure, and dilating bronchi.
2. Pharm. a commercial form of this substance used for emergency treatment of lowered blood pressure.
[ 1940-45; NOR- + EPINEPHRINE ]